[Mushrooshi]

What is the actual diameter of the Omniwheel, and what is the actual diameter of the '3 inch' wheels. I downloaded the models, and to me, it looks like the omniwheels are much bigger in diameter than the 3 inch ones. I tried looking for actual diameters, but I have no avail. The Lego website lists both as 3 inch, but I'm guessing that is just approximation/rounding...